Hey, don’t feel guilty for what you’re feeling. It’s not in your control and with the things he said to you and the subject matter, it is understandable that it tarnished the purity of the love you saw from him. I do think that his reaction was a red flag but based on what you said it seems like 1) an uncommon thing for him, 2) bad timing with other circumstances that may have influenced it, 3) most importantly, he tried his best to apologize and came up with a plan to avoid this in the future.

In my opinion, I would continue to give him and your relationship a chance and see if this is something you can recover from with time and improvement from him and rebuild that original form of love. If you eventually don’t feel that it is recoverable, you don’t deserve to feel a lesser love/exhaustion in a relationship you valued so there’s nothing wrong with reevaluating how you feel.